ISTP - Introvert, Sensing, Thinking, Perceiving.
ISTPs are observant artisans with an understanding of mechanics and an interest in troubleshooting. They approach their environments with a flexible logic, looking for practical solutions to the problems at hand. They are independent and adaptable and typically interact with the world around them in a self-directed, spontaneous manner.
ISTPs are optimistic and energetic, creative and practical, spontaneous and rational, know how to prioritize, great in a crisis and relaxed. They are also stubborn, insensitive, private and reserved, easily bored, dislike commitment and have risky behaviour.
In the population, 5.4% are ISTPs. 8.5% are men, 2.3% are women.